US PATENT SUBCLASS 363 / 15
.~ Including D.C.-A.C.-D.C. converter

Current as of: June, 1999
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363 /   HD   ELECTRIC POWER CONVERSION SYSTEMS

13  DF  CURRENT CONVERSION {25}
15.~ Including D.C.-A.C.-D.C. converter {5}
16  DF  .~.~> Having transistorized inverter {5}
27  DF  .~.~> Having thyristor inverter (e.g., SCR) {1}
29  DF  .~.~> Having electron tube inverter {2}
32  DF  .~.~> Rotary-commutator-type inverter
33  DF  .~.~> Vibrator-type inverter

DEFINITION

Classification: 363/15

Including D.C.-A.C.-D.C. converter:

(under subclass 13) Subject matter including a first stage with means to change direct current to intermediate alternating current, and a further second stage with means to change the intermediate alternating current to direct current.

(1) Note. Chopper-type converters are classified in this or indented subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

52+, 67+, 76+, 81+, 84+, 108+, 114+, and 125+, for single stage A.C.-D.C. systems.

55+, 71+, 95+, 109, 120+, 131+, and 135+, for single stage D.C.-A.C. systems.

SEE OR SEARCH CLASS

324, Electricity: Measuring and Testing, 118, for amplifiers of the type described below under Class 330, when claimed in combination with a meter.

330, Amplifiers,

10, for amplifier systems for D.C. amplification which have a modulator means to convert D.C. to A.C., and A.C. amplifier and demodulator means to detect the D.C. signal for feeding to the load. See the search notes thereunder.